/*
 * Copyright 2010-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jslet.paas.security;

import javax.annotation.Resource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import org.jslet.paas.user.User;
import org.jslet.paas.user.service.UserService;

@Service("paasUserDetailService")
public class PaasUserDetailService implements UserDetailsService
{
	@Resource(name="userService")
	private UserService userService;
	
	private static final Logger logger = LoggerFactory.getLogger(PaasUserDetailService.class);
	
	public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException
	{
		User user = this.userService.findUserByName(username);
		if(user == null){
			String errMsg = "user name:" + username + " NOT found!";
			logger.error(errMsg);
			throw new UsernameNotFoundException(errMsg);
		}

		if(logger.isDebugEnabled())
			logger.debug("User: " + username + " attampt to log in.");
		return user;
	}

}
